SIMULATION OF FLOW WITHIN THE DIFFERENT CAVITIES USING SST K-Ω TURBULENCE MODEL

Year 2016, Volume: 1 Issue: 3, 79 - 92, 01.08.2016

Nehir Tokgoz Rahim Hassanzadeh Besir Sahin

Abstract

This work is a three-dimensional investigation about the flow structure within three different cavities such as rectangular, triangular and semi-circular shapes using computational fluid dynamics. The present study is performed based on the Reynolds numbers of 1,000. The aspect ratio of all under consideration cavities is L/D=2. In order to simulate and study the flow characteristics, SST K-ω model is combined with Navier-Stokes equations and applied on the non-uniform multi-block grid systems based on the finite volume technique. For enhanced visualization, different time-averaged and instantaneous flow patterns are presented. Within the cavities three different vortex mechanisms including of primary, developing and corner vortices are observed. Examination of instantaneous flow data revealed that the rate of unsteadiness within the rectangular cavity is higher than two other cavities. Finally, it is stated that at Re=1,000, flow is two-dimensional with respect to stream-wise and normal directions

Keywords

Cavity, Computational Fluid Dynamics (CFD), Finite volume method

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